diff -urN bzflag-2.0.8.orig/src/bzfs/bzfs.cxx bzflag-2.0.8/src/bzfs/bzfs.cxx

--- bzflag-2.0.8.orig/src/bzfs/bzfs.cxx	2006-05-16 13:06:45 +0400

+++ bzflag-2.0.8/src/bzfs/bzfs.cxx	2006-05-16 13:06:58 +0400

@@ -20,6 +20,12 @@

 #include <vector>

 #include <string>

 #include <time.h>

+#ifndef _WIN32

+#include <unistd.h>

+#include <sys/types.h>

+#include <pwd.h>

+#include <grp.h>

+#endif

 // implementation-specific bzflag headers

 #include "NetHandler.h"

@@ -4545,6 +4551,78 @@

     return 2;

   }

+#ifndef _WIN32

+	struct passwd *user;

+	struct group *group;

+	uid_t uid = -1;

+	gid_t gid = -1;

+			

+	if (clOptions->doDaemon) 

+	{

+		if (( clOptions->user.length() != 0 ) && ( clOptions->group.length() != 0 ))

+		{

+

+			user = getpwnam(clOptions->user.c_str());

+			group = getgrnam(clOptions->group.c_str());

+

+			if (user) 

+				uid = user->pw_uid;

+			else

+				std::cerr << "Couldn't find user " << clOptions->user << " in password file" << std::endl;

+			

+			if (group) 

+				gid = group->gr_gid;

+			else

+				std::cerr << "Couldn't find group " << clOptions->group << " in groups file" << std::endl;

+

+		}

+		

+		if(getuid()) /* root check */

+		{

+			std::cerr << "WARNING: Cant' change user/group id unless you are root." << std::endl;

+			return 0;

+		}

+

+		if( (int) gid != -1) 

+		{

+			if(!setgid(gid))

+				std::cout << "Changed groupid to " << (int) gid << std::endl;

+			else

+			{

+				std::cerr << "Error changing groupd: " << strerror(errno) << std::endl;

+				return 0;

+			}

+		}

+

+		if( (int) uid != -1) {

+			if(!setuid(uid))

+				std::cout << "Changed userid to " << (int) uid << std::endl;

+			else

+			{

+				std::cerr << "Error changing userid: " << strerror(errno) << std::endl;

+				return 0;

+			}

+		}

+	

+		daemon(0,0);

+	}

+#endif

+

+	if(clOptions->pidFileName.length() != 0)

+	{ 

+		unsigned int pid = 0;

+		FILE *fp = fopen(clOptions->pidFileName.c_str(), "wt");

+		#ifndef _WIN32

+		pid = getpid();

+		#else

+		pid = _getpid();

+		#endif

+		if (fp) 

+		{

+			fprintf(fp, "%d", pid);

+			fclose(fp);

+		}

+	}

   /* MAIN SERVER RUN LOOP

    *

diff -urN bzflag-2.0.8.orig/src/bzfs/CmdLineOptions.cxx bzflag-2.0.8/src/bzfs/CmdLineOptions.cxx

--- bzflag-2.0.8.orig/src/bzfs/CmdLineOptions.cxx	2006-05-16 13:06:45 +0400

+++ bzflag-2.0.8/src/bzfs/CmdLineOptions.cxx	2006-05-16 13:17:47 +0400

@@ -73,8 +73,14 @@

 "[-filterCallsigns] "

 "[-filterChat] "

 "[-filterSimple] "

+#ifndef _WIN32

+"[+daemon] "

+#endif

 "[-g] "

 "[-gndtex <texture name>] "

+#ifndef _WIN32

+"[-group <groupname> ] "

+#endif

 "[-groupdb <group file>] "

 "[-h] "

 "[-handicap] "

@@ -134,6 +140,9 @@

 "[-timemanual] "

 "[-tk] "

 "[-tkkr <percent>] "

+#ifndef _WIN32

+"[-user <username> ] "

+#endif

 "[-ts [micros]] "

 "[-userdb <user permissions file>] "

 "[-vars <filename>] "

@@ -167,8 +176,12 @@

 "\t-filterCallsigns: filter callsigns to disallow inappropriate user names\n"

 "\t-filterChat: filter chat messages\n"

 "\t-filterSimple: perform simple exact matches with the bad word list\n"

+#ifndef _WIN32

+"\t+daemon: daemonize server\n"

+#endif

 "\t-g: serve one game and then exit\n"

 "\t-gndtex: specify ground texture\n"

+"\t-group: group to start bzfs as (only with +daemon and +user)\n"

 "\t-groupdb: file to read for group permissions\n"

 "\t-h: use random building heights\n"

 "\t-handicap: give advantage based on relative playing ability\n"

@@ -233,6 +246,7 @@

 "\t-timemanual: countdown for timed games is started with /countdown\n"

 "\t-tk: player does not die when killing a teammate\n"

 "\t-tkkr: team-kills-to-wins percentage (1-100) for kicking tk-ing players\n"

+"\t-user: user to start bzfs as (only with +daemon and -group)\n"

 "\t-ts [micros]: timestamp all console output, [micros] to include\n"

 "\t\tmicroseconds\n"

 "\t-userdb: file to read for user access permissions\n"

@@ -832,18 +846,8 @@

       options.password = argv[i];

       memset(argv[i], ' ', options.password.size());

     } else if (strcmp(argv[i], "-pidfile") == 0) {

-      unsigned int pid = 0;

 	  checkArgc(1, i, argc, argv[i]);

-      FILE *fp = fopen(argv[i], "wt");

-#ifndef _WIN32

-      pid = getpid();

-#else

-      pid = _getpid();

-#endif

-      if (fp) {

-	fprintf(fp, "%d", pid);

-	fclose(fp);

-      }

+	  options.pidFileName = argv[i];

     }  else if (strcmp(argv[i], "-pf") == 0) {

       // try wksPort first and if we can't open that port then

       // let system assign a port for us.

@@ -1138,6 +1142,14 @@

       checkArgc(1, i, argc, argv[i]);

       BZDB.set(StateDatabase::BZDB_WORLDSIZE, TextUtils::format("%d",atoi(argv[i])*2));

       std::cerr << "using world size of \"" << BZDBCache::worldSize << "\"" << std::endl;

+    } else if (strcmp(argv[i], "+daemon") == 0 ) {

+      options.doDaemon = true;

+    } else if (strcmp(argv[i], "-user") == 0 ) {

+		checkArgc(1, i, argc, argv[i]);

+		options.user = argv[i];

+    } else if (strcmp(argv[i], "-group") == 0 ) {

+		checkArgc(1, i, argc, argv[i]);

+		options.group = argv[i];

     } else {

       std::cerr << "bad argument \"" << argv[i] << "\"" << std::endl;

       usage(argv[0]);

diff -urN bzflag-2.0.8.orig/src/bzfs/CmdLineOptions.h bzflag-2.0.8/src/bzfs/CmdLineOptions.h

--- bzflag-2.0.8.orig/src/bzfs/CmdLineOptions.h	2006-05-16 13:06:45 +0400

+++ bzflag-2.0.8/src/bzfs/CmdLineOptions.h	2006-05-16 13:07:10 +0400

@@ -78,7 +78,8 @@

     filterFilename(""), filterCallsigns(false), filterChat(false), filterSimple(false),

     banTime(300), voteTime(60), vetoTime(2), votesRequired(2),

     votePercentage(50.1f), voteRepeatTime(300),

-    autoTeam(false), citySize(5), cacheURL(""), cacheOut("")

+    autoTeam(false), citySize(5), cacheURL(""), cacheOut(""), 

+    doDaemon(false), pidFileName(""), user(""), group("")

   {

     int i;

     for (FlagTypeMap::iterator it = FlagType::getFlagMap().begin();

@@ -196,6 +197,19 @@

   std::string	   cacheURL;

   std::string	   cacheOut;

+  

+  //forking or not

+  bool doDaemon;

+

+  //pidfile

+  std::string pidFileName;

+

+  //user

+  std::string user;

+

+  //group

+

+  std::string group;

   // plugins

   typedef struct